Thanks for the insights. I realized last night that you could also see this via united.com's "expert mode" or by searching use "Confirmed Regional Upgrade". So i searched the flight but the cheapest fare that was in the OP, $139... doesn't show it is upgradable. Are y'all certain (as long as the upgrade inventory is there), that the "G" class fare would be upgradable with a Continental or United Instrument? A CR1 or SWU?